Long-Duration Insurance Contracts - Weighted-Average Durations of LFPB (Details)	Dec. 31, 2025	Dec. 31, 2024
Whole life
Liability for Future Policy Benefit, by Product Segment [Line Items]
Weighted-average duration	20 years 1 month 6 days	20 years
Term life
Liability for Future Policy Benefit, by Product Segment [Line Items]
Weighted-average duration	15 years 10 months 24 days	16 years
Experience life
Liability for Future Policy Benefit, by Product Segment [Line Items]
Weighted-average duration	9 years 6 months	10 years
Limited-Pay Whole Life
Liability for Future Policy Benefit, by Product Segment [Line Items]
Weighted-average duration	25 years 2 months 12 days	25 years
Supplemental health
Liability for Future Policy Benefit, by Product Segment [Line Items]
Weighted-average duration	11 years 9 months 18 days	11 years 3 months 18 days
SPIA (life contingent)
Liability for Future Policy Benefit, by Product Segment [Line Items]
Weighted-average duration	7 years 4 months 24 days	8 years